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The adaptive and adjustable regulated power supply made by L

2014-11-20 00:26  
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The adaptive and adjustable regulated power supply made by LM317
The picture shows a adaptive and adjustable regulated power supply. This power supply uses LM317 as the regulated component. Using this circuit to adjust the input voltage based on the output voltage which can reduce the voltage difference between input and output voltage to lower the power consumption of the power supply. VT2, VD5, VW, R5, R6, C10 and K form adaptive converting circuit. When the output voltage is lower than 14 V, VW, VT2 and K all stop and the 14 V voltage of transformer is connected to regulated circuit. Appositively, when output voltage is over 14 V, VM, VT2 and K are all working well, the transformer offers 28 V AC voltage to regulated circuit.